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v1.0.0
ICD-10 Guide
ICD-10 CodesG23.2

G23.2

Billable

Striatonigral degeneration

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/05/2025

Code Description

ICD-10 G23.2 is a billable code used to indicate a diagnosis of striatonigral degeneration.

Key Diagnostic Point:

Striatonigral degeneration is a rare neurodegenerative disorder characterized by the progressive degeneration of the striatum and substantia nigra, which are critical components of the basal ganglia involved in the regulation of movement. This condition is classified under the category of atypical parkinsonian syndromes, which exhibit symptoms similar to Parkinson's disease but have distinct pathological features. Patients typically present with a combination of parkinsonism, including bradykinesia, rigidity, and postural instability, along with additional symptoms such as dysarthria, dysphagia, and cognitive decline. Unlike classic Parkinson's disease, striatonigral degeneration may also lead to significant autonomic dysfunction and a more rapid progression of symptoms. The underlying pathophysiology involves the accumulation of abnormal proteins and neuronal loss, particularly affecting dopaminergic pathways. Diagnosis is primarily clinical, supported by neuroimaging findings that may reveal atrophy of the striatum. Management often includes dopaminergic medications, although their efficacy may be limited compared to traditional Parkinson's disease treatments. As the disease progresses, patients may require comprehensive care, including physical therapy and supportive services.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Differentiation from other movement disorders
  • Variability in symptom presentation
  • Need for comprehensive clinical documentation
  • Potential overlap with Parkinson's disease codes

Audit Risk Factors

  • Inadequate documentation of clinical findings
  • Misclassification with other movement disorders
  • Failure to document the progression of symptoms
  • Lack of supporting imaging studies

Specialty Focus

Medical Specialties

Neurology

Documentation Requirements

Detailed neurological examination findings, imaging results, and treatment response.

Common Clinical Scenarios

Diagnosis of atypical parkinsonism, management of motor symptoms, and cognitive assessments.

Billing Considerations

Ensure clear documentation of symptom onset and progression to support the diagnosis.

Geriatrics

Documentation Requirements

Comprehensive assessment of functional status and comorbidities.

Common Clinical Scenarios

Management of elderly patients with movement disorders and cognitive decline.

Billing Considerations

Consideration of polypharmacy and its impact on treatment outcomes.

Coding Guidelines

Inclusion Criteria

Use G23.2 When
  • According to ICD
  • 10 coding guidelines, G23
  • 2 should be used when the clinical presentation aligns with striatonigral degeneration
  • Coders must ensure that the diagnosis is supported by clinical documentation and that other potential diagnoses are ruled out

Exclusion Criteria

Do NOT use G23.2 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

99214CPT Code

Established patient office visit, level 4

Clinical Scenario

Used for follow-up visits for patients with striatonigral degeneration.

Documentation Requirements

Document history, examination findings, and treatment plan.

Specialty Considerations

Neurologists should focus on neurological assessments and medication management.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of striatonigral degeneration, improving the accuracy of data collection and facilitating better patient management strategies.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of striatonigral degeneration, improving the accuracy of data collection and facilitating better patient management strategies.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of striatonigral degeneration, improving the accuracy of data collection and facilitating better patient management strategies.

Resources

Clinical References

  • •
    National Institute of Neurological Disorders and Stroke

Coding & Billing References

  • •
    National Institute of Neurological Disorders and Stroke

Frequently Asked Questions

What are the primary symptoms of striatonigral degeneration?

Primary symptoms include bradykinesia, rigidity, dysarthria, dysphagia, and cognitive decline, often progressing rapidly compared to typical Parkinson's disease.